Article 98-8-12 is being republished in its entirety to update the model year coverage

ISSUE:

A cab/body bounce at highway speeds may be felt on some vehicles. This may be caused by road input (e.g., segmented concrete roads) that causes the cab/body to bounce rhythmically fore & aft at highway speeds.

ACTION:

Install a rear bumper damper assembly. The damper assembly should reduce the possibility of vibration. Refer to the following Service Procedure for details.

SERVICE PROCEDURE

Road test to verify condition is unique to road input (e.g., segmented concrete roads). If condition is caused by road input, install a rear bumper damper assembly as described in the following steps.

Route both license plate lamps wiring between damper ends and top lip of bumper, and permanently position using tape or tie strap. Be sure to route and secure the wiring away from the moving portion of the damper.